DateTimeFormatInfo.GetAllDateTimePatterns 方法

定義

傳回可格式化日期和時間值的標準模式。Returns the standard patterns in which date and time values can be formatted.

多載

GetAllDateTimePatterns()

傳回可格式化日期和時間值的所有標準模式。Returns all the standard patterns in which date and time values can be formatted.

GetAllDateTimePatterns(Char)

傳回可以使用所指定標準格式字串來格式化日期和時間值的所有模式。Returns all the patterns in which date and time values can be formatted using the specified standard format string.

GetAllDateTimePatterns()

傳回可格式化日期和時間值的所有標準模式。Returns all the standard patterns in which date and time values can be formatted.

public:
 cli::array <System::String ^> ^ GetAllDateTimePatterns();
public string[] GetAllDateTimePatterns ();
member this.GetAllDateTimePatterns : unit -> string[]
Public Function GetAllDateTimePatterns () As String()

傳回

String[]

陣列,其中包含可格式化日期和時間值的標準模式。An array that contains the standard patterns in which date and time values can be formatted.

範例

下列範例會顯示不因文化特性而異的日期和時間格式字串,以及使用該格式字串來格式化特定日期時所產生的結果字串。The following example displays the date and time format strings for the invariant culture, as well as the result string that is produced when that format string is used to format a particular date.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      DateTime date = new DateTime(2014, 8, 28, 12, 28, 30);
      DateTimeFormatInfo invDTF = new DateTimeFormatInfo();
      String[] formats = invDTF.GetAllDateTimePatterns();

      Console.WriteLine("{0,-40} {1}\n", "Pattern", "Result String");
      foreach (var fmt in formats)
         Console.WriteLine("{0,-40} {1}", fmt, date.ToString(fmt));
   }
}
// The example displays the following output:
//    Pattern                                  Result String
//
//    MM/dd/yyyy                               08/28/2014
//    yyyy-MM-dd                               2014-08-28
//    dddd, dd MMMM yyyy                       Thursday, 28 August 2014
//    dddd, dd MMMM yyyy HH:mm                 Thursday, 28 August 2014 12:28
//    dddd, dd MMMM yyyy hh:mm tt              Thursday, 28 August 2014 12:28 PM
//    dddd, dd MMMM yyyy H:mm                  Thursday, 28 August 2014 12:28
//    dddd, dd MMMM yyyy h:mm tt               Thursday, 28 August 2014 12:28 PM
//    dddd, dd MMMM yyyy HH:mm:ss              Thursday, 28 August 2014 12:28:30
//    MM/dd/yyyy HH:mm                         08/28/2014 12:28
//    MM/dd/yyyy hh:mm tt                      08/28/2014 12:28 PM
//    MM/dd/yyyy H:mm                          08/28/2014 12:28
//    MM/dd/yyyy h:mm tt                       08/28/2014 12:28 PM
//    yyyy-MM-dd HH:mm                         2014-08-28 12:28
//    yyyy-MM-dd hh:mm tt                      2014-08-28 12:28 PM
//    yyyy-MM-dd H:mm                          2014-08-28 12:28
//    yyyy-MM-dd h:mm tt                       2014-08-28 12:28 PM
//    MM/dd/yyyy HH:mm:ss                      08/28/2014 12:28:30
//    yyyy-MM-dd HH:mm:ss                      2014-08-28 12:28:30
//    MMMM dd                                  August 28
//    MMMM dd                                  August 28
//    yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK   2014-08-28T12:28:30.0000000
//    yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK   2014-08-28T12:28:30.0000000
//    ddd, dd MMM yyyy HH':'mm':'ss 'GMT'      Thu, 28 Aug 2014 12:28:30 GMT
//    ddd, dd MMM yyyy HH':'mm':'ss 'GMT'      Thu, 28 Aug 2014 12:28:30 GMT
//    yyyy'-'MM'-'dd'T'HH':'mm':'ss            2014-08-28T12:28:30
//    HH:mm                                    12:28
//    hh:mm tt                                 12:28 PM
//    H:mm                                     12:28
//    h:mm tt                                  12:28 PM
//    HH:mm:ss                                 12:28:30
//    yyyy'-'MM'-'dd HH':'mm':'ss'Z'           2014-08-28 12:28:30Z
//    dddd, dd MMMM yyyy HH:mm:ss              Thursday, 28 August 2014 12:28:30
//    yyyy MMMM                                2014 August
//    yyyy MMMM                                2014 August
Imports System.Globalization

Module Example
   Public Sub Main()
      Dim date1 As Date = #08/28/2014 12:28:30PM#
      Dim invDTF As New DateTimeFormatInfo()
      Dim formats() As String = invDTF.GetAllDateTimePatterns()

      Console.WriteLine("{0,-40} {1}", "Pattern", "Result String")
      Console.WriteLine()
      For Each fmt In formats
         Console.WriteLine("{0,-40} {1}", fmt, date1.ToString(fmt))
      Next
   End Sub
End Module
' The example displays the following output:
'    Pattern                                  Result String
'
'    MM/dd/yyyy                               08/28/2014
'    yyyy-MM-dd                               2014-08-28
'    dddd, dd MMMM yyyy                       Thursday, 28 August 2014
'    dddd, dd MMMM yyyy HH:mm                 Thursday, 28 August 2014 12:28
'    dddd, dd MMMM yyyy hh:mm tt              Thursday, 28 August 2014 12:28 PM
'    dddd, dd MMMM yyyy H:mm                  Thursday, 28 August 2014 12:28
'    dddd, dd MMMM yyyy h:mm tt               Thursday, 28 August 2014 12:28 PM
'    dddd, dd MMMM yyyy HH:mm:ss              Thursday, 28 August 2014 12:28:30
'    MM/dd/yyyy HH:mm                         08/28/2014 12:28
'    MM/dd/yyyy hh:mm tt                      08/28/2014 12:28 PM
'    MM/dd/yyyy H:mm                          08/28/2014 12:28
'    MM/dd/yyyy h:mm tt                       08/28/2014 12:28 PM
'    yyyy-MM-dd HH:mm                         2014-08-28 12:28
'    yyyy-MM-dd hh:mm tt                      2014-08-28 12:28 PM
'    yyyy-MM-dd H:mm                          2014-08-28 12:28
'    yyyy-MM-dd h:mm tt                       2014-08-28 12:28 PM
'    MM/dd/yyyy HH:mm:ss                      08/28/2014 12:28:30
'    yyyy-MM-dd HH:mm:ss                      2014-08-28 12:28:30
'    MMMM dd                                  August 28
'    MMMM dd                                  August 28
'    yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK   2014-08-28T12:28:30.0000000
'    yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK   2014-08-28T12:28:30.0000000
'    ddd, dd MMM yyyy HH':'mm':'ss 'GMT'      Thu, 28 Aug 2014 12:28:30 GMT
'    ddd, dd MMM yyyy HH':'mm':'ss 'GMT'      Thu, 28 Aug 2014 12:28:30 GMT
'    yyyy'-'MM'-'dd'T'HH':'mm':'ss            2014-08-28T12:28:30
'    HH:mm                                    12:28
'    hh:mm tt                                 12:28 PM
'    H:mm                                     12:28
'    h:mm tt                                  12:28 PM
'    HH:mm:ss                                 12:28:30
'    yyyy'-'MM'-'dd HH':'mm':'ss'Z'           2014-08-28 12:28:30Z
'    dddd, dd MMMM yyyy HH:mm:ss              Thursday, 28 August 2014 12:28:30
'    yyyy MMMM                                2014 August
'    yyyy MMMM                                2014 August

此範例會藉由呼叫 DateTimeFormatInfo 的函式,具現化代表不因文化特性而異的 DateTimeFormatInfo 物件。The example instantiates a DateTimeFormatInfo object that represents the invariant culture by calling the DateTimeFormatInfo constructor. 它也可以從 InvariantInfo 屬性抓取代表不因文化特性而異的 DateTimeFormatInfoIt could also retrieve a DateTimeFormatInfo that represents the invariant culture from the InvariantInfo property.

備註

這個方法會傳回陣列,其中包含對應至標準格式字串的所有自訂格式字串。This method returns an array that contains all custom format strings that correspond to standard format strings. 如需標準格式字串的清單,請參閱標準日期和時間格式字串See Standard Date and Time Format Strings for a list of the standard format strings.

您可以在格式化作業中,使用 GetAllDateTimePatterns 方法所傳回陣列中的自訂格式字串。You can use the custom format strings in the array returned by the GetAllDateTimePatterns method in formatting operations. 不過,如果您這樣做,ParseTryParse 方法都無法成功剖析在該格式化作業中傳回之日期和時間值的字串表示。However, if you do, the string representation of a date and time value returned in that formatting operation cannot always be parsed successfully by the Parse and TryParse methods. 因此,您無法假設 GetAllDateTimePatterns 方法所傳回的自訂格式字串,可以用來反復存取日期和時間值。Therefore, you cannot assume that the custom format strings returned by the GetAllDateTimePatterns method can be used to round-trip date and time values. 下列範例說明此問題。The following example illustrates this problem. 它會抓取 DateTimeFormatInfo 物件,其中包含義大利文(義大利文)文化特性的格式資訊。It retrieves a DateTimeFormatInfo object that contains formatting information for the Italy (Italian) culture. 它會將 GetAllDateTimePatterns() 方法所傳回之陣列中的每個自訂格式字串傳遞給 DateTime.ToString(String) 方法,以建立日期和時間的字串表示。It passes each custom format string in the array returned by the GetAllDateTimePatterns() method to the DateTime.ToString(String) method to create the string representation of a date and time. 然後,此範例會藉由呼叫 DateTime.TryParse(String, DateTime) 方法,嘗試剖析此值。This example then attempts to parse this value by calling the DateTime.TryParse(String, DateTime) method. 如範例的輸出所示,某些自訂格式字串不會產生成功往返的日期和時間值。As the output from the example shows, some of the custom format strings do not produce a date and time value that successfully round-trips.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      CultureInfo culture = CultureInfo.CreateSpecificCulture("it-IT");
      DateTime date1 = new DateTime(2011, 02, 01, 7, 30, 45, 0);
      DateTime date2;
      int total = 0;
      int noRoundTrip = 0;
      
      foreach (var fmt in culture.DateTimeFormat.GetAllDateTimePatterns()) {
         total += 1;
         if (! DateTime.TryParse(date1.ToString(fmt), out date2)) {
            noRoundTrip++;
            Console.WriteLine("Unable to parse {0:" + fmt + "} (format '{1}')", 
                              date1, fmt);
         }             
      }
      Console.WriteLine("\nUnable to round-trip {0} of {1} format strings.",
                        noRoundTrip, total);
   }
}
// The example displays the following output:
//    Unable to parse Tuesday 1 February 2011 7.30 (format 'dddd d MMMM yyyy H.mm')
//    Unable to parse Tuesday 1 February 2011 07.30 (format 'dddd d MMMM yyyy HH.mm')
//    Unable to parse 1-Feb-11 7.30 (format 'd-MMM-yy H.mm')
//    Unable to parse 1-Feb-11 07.30 (format 'd-MMM-yy HH.mm')
//    Unable to parse 1 February 2011 7.30 (format 'd MMMM yyyy H.mm')
//    Unable to parse 1 February 2011 07.30 (format 'd MMMM yyyy HH.mm')
//    Unable to parse Tuesday 1 February 2011 7.30.45 (format 'dddd d MMMM yyyy H.mm.ss')
//    Unable to parse Tuesday 1 February 2011 07.30.45 (format 'dddd d MMMM yyyy HH.mm.ss')
//    Unable to parse 1-Feb-11 7.30.45 (format 'd-MMM-yy H.mm.ss')
//    Unable to parse 1-Feb-11 07.30.45 (format 'd-MMM-yy HH.mm.ss')
//    Unable to parse 1 February 2011 7.30.45 (format 'd MMMM yyyy H.mm.ss')
//    Unable to parse 1 February 2011 07.30.45 (format 'd MMMM yyyy HH.mm.ss')
//    Unable to parse 01/02/2011 7.30 (format 'dd/MM/yyyy H.mm')
//    Unable to parse 01/02/2011 07.30 (format 'dd/MM/yyyy HH.mm')
//    Unable to parse 01/Feb/2011 7.30 (format 'dd/MMM/yyyy H.mm')
//    Unable to parse 01/Feb/2011 07.30 (format 'dd/MMM/yyyy HH.mm')
//    Unable to parse 01/02/11 7.30 (format 'dd/MM/yy H.mm')
//    Unable to parse 01/02/11 07.30 (format 'dd/MM/yy HH.mm')
//    Unable to parse 01.2.11 7.30 (format 'dd.M.yy H.mm')
//    Unable to parse 01.2.11 07.30 (format 'dd.M.yy HH.mm')
//    Unable to parse 1/2/11 7.30 (format 'd/M/yy H.mm')
//    Unable to parse 1/2/11 07.30 (format 'd/M/yy HH.mm')
//    Unable to parse 2011-02-01 7.30 (format 'yyyy-MM-dd H.mm')
//    Unable to parse 2011-02-01 07.30 (format 'yyyy-MM-dd HH.mm')
//    Unable to parse 01/02/2011 7.30.45 (format 'dd/MM/yyyy H.mm.ss')
//    Unable to parse 01/02/2011 07.30.45 (format 'dd/MM/yyyy HH.mm.ss')
//    Unable to parse 01/Feb/2011 7.30.45 (format 'dd/MMM/yyyy H.mm.ss')
//    Unable to parse 01/Feb/2011 07.30.45 (format 'dd/MMM/yyyy HH.mm.ss')
//    Unable to parse 01/02/11 7.30.45 (format 'dd/MM/yy H.mm.ss')
//    Unable to parse 01/02/11 07.30.45 (format 'dd/MM/yy HH.mm.ss')
//    Unable to parse 01.2.11 7.30.45 (format 'dd.M.yy H.mm.ss')
//    Unable to parse 01.2.11 07.30.45 (format 'dd.M.yy HH.mm.ss')
//    Unable to parse 1/2/11 7.30.45 (format 'd/M/yy H.mm.ss')
//    Unable to parse 1/2/11 07.30.45 (format 'd/M/yy HH.mm.ss')
//    Unable to parse 2011-02-01 7.30.45 (format 'yyyy-MM-dd H.mm.ss')
//    Unable to parse 2011-02-01 07.30.45 (format 'yyyy-MM-dd HH.mm.ss')
//    Unable to parse Tuesday 1 February 2011 7.30.45 (format 'dddd d MMMM yyyy H.mm.ss')
//    Unable to parse Tuesday 1 February 2011 07.30.45 (format 'dddd d MMMM yyyy HH.mm.ss')
//    Unable to parse 1-Feb-11 7.30.45 (format 'd-MMM-yy H.mm.ss')
//    Unable to parse 1-Feb-11 07.30.45 (format 'd-MMM-yy HH.mm.ss')
//    Unable to parse 1 February 2011 7.30.45 (format 'd MMMM yyyy H.mm.ss')
//    Unable to parse 1 February 2011 07.30.45 (format 'd MMMM yyyy HH.mm.ss')
//    
//    Unable to round-trip 42 of 98 format strings.
Imports System.Globalization

Module Example
   Public Sub Main()
      Dim culture As CultureInfo = CultureInfo.CreateSpecificCulture("it-IT")
      Dim date1 = New DateTime(2011, 02, 01, 7, 30, 45, 0)
      Dim date2 As DateTime
      Dim total, noRoundTrip As Integer
      
      For Each fmt In culture.DateTimeFormat.GetAllDateTimePatterns()
         total += 1
         If Not DateTime.TryParse(date1.ToString(fmt), date2)
            noRoundTrip += 1
            Console.WriteLine("Unable to parse {0:" + fmt + "} (format '{1}')", 
                              date1, fmt)
         End If             
      Next
      Console.WriteLine()
      Console.WriteLine("Unable to round-trip {0} of {1} format strings.",
                        noRoundTrip, total)
   End Sub
End Module
' The example displays the following output:
'    Unable to parse Tuesday 1 February 2011 7.30 (format 'dddd d MMMM yyyy H.mm')
'    Unable to parse Tuesday 1 February 2011 07.30 (format 'dddd d MMMM yyyy HH.mm')
'    Unable to parse 1-Feb-11 7.30 (format 'd-MMM-yy H.mm')
'    Unable to parse 1-Feb-11 07.30 (format 'd-MMM-yy HH.mm')
'    Unable to parse 1 February 2011 7.30 (format 'd MMMM yyyy H.mm')
'    Unable to parse 1 February 2011 07.30 (format 'd MMMM yyyy HH.mm')
'    Unable to parse Tuesday 1 February 2011 7.30.45 (format 'dddd d MMMM yyyy H.mm.ss')
'    Unable to parse Tuesday 1 February 2011 07.30.45 (format 'dddd d MMMM yyyy HH.mm.ss')
'    Unable to parse 1-Feb-11 7.30.45 (format 'd-MMM-yy H.mm.ss')
'    Unable to parse 1-Feb-11 07.30.45 (format 'd-MMM-yy HH.mm.ss')
'    Unable to parse 1 February 2011 7.30.45 (format 'd MMMM yyyy H.mm.ss')
'    Unable to parse 1 February 2011 07.30.45 (format 'd MMMM yyyy HH.mm.ss')
'    Unable to parse 01/02/2011 7.30 (format 'dd/MM/yyyy H.mm')
'    Unable to parse 01/02/2011 07.30 (format 'dd/MM/yyyy HH.mm')
'    Unable to parse 01/Feb/2011 7.30 (format 'dd/MMM/yyyy H.mm')
'    Unable to parse 01/Feb/2011 07.30 (format 'dd/MMM/yyyy HH.mm')
'    Unable to parse 01/02/11 7.30 (format 'dd/MM/yy H.mm')
'    Unable to parse 01/02/11 07.30 (format 'dd/MM/yy HH.mm')
'    Unable to parse 01.2.11 7.30 (format 'dd.M.yy H.mm')
'    Unable to parse 01.2.11 07.30 (format 'dd.M.yy HH.mm')
'    Unable to parse 1/2/11 7.30 (format 'd/M/yy H.mm')
'    Unable to parse 1/2/11 07.30 (format 'd/M/yy HH.mm')
'    Unable to parse 2011-02-01 7.30 (format 'yyyy-MM-dd H.mm')
'    Unable to parse 2011-02-01 07.30 (format 'yyyy-MM-dd HH.mm')
'    Unable to parse 01/02/2011 7.30.45 (format 'dd/MM/yyyy H.mm.ss')
'    Unable to parse 01/02/2011 07.30.45 (format 'dd/MM/yyyy HH.mm.ss')
'    Unable to parse 01/Feb/2011 7.30.45 (format 'dd/MMM/yyyy H.mm.ss')
'    Unable to parse 01/Feb/2011 07.30.45 (format 'dd/MMM/yyyy HH.mm.ss')
'    Unable to parse 01/02/11 7.30.45 (format 'dd/MM/yy H.mm.ss')
'    Unable to parse 01/02/11 07.30.45 (format 'dd/MM/yy HH.mm.ss')
'    Unable to parse 01.2.11 7.30.45 (format 'dd.M.yy H.mm.ss')
'    Unable to parse 01.2.11 07.30.45 (format 'dd.M.yy HH.mm.ss')
'    Unable to parse 1/2/11 7.30.45 (format 'd/M/yy H.mm.ss')
'    Unable to parse 1/2/11 07.30.45 (format 'd/M/yy HH.mm.ss')
'    Unable to parse 2011-02-01 7.30.45 (format 'yyyy-MM-dd H.mm.ss')
'    Unable to parse 2011-02-01 07.30.45 (format 'yyyy-MM-dd HH.mm.ss')
'    Unable to parse Tuesday 1 February 2011 7.30.45 (format 'dddd d MMMM yyyy H.mm.ss')
'    Unable to parse Tuesday 1 February 2011 07.30.45 (format 'dddd d MMMM yyyy HH.mm.ss')
'    Unable to parse 1-Feb-11 7.30.45 (format 'd-MMM-yy H.mm.ss')
'    Unable to parse 1-Feb-11 07.30.45 (format 'd-MMM-yy HH.mm.ss')
'    Unable to parse 1 February 2011 7.30.45 (format 'd MMMM yyyy H.mm.ss')
'    Unable to parse 1 February 2011 07.30.45 (format 'd MMMM yyyy HH.mm.ss')
'    
'    Unable to round-trip 42 of 98 format strings.

若要剖析以數個預先定義的自訂格式表示之日期和時間的字串表示,請呼叫下列其中一個方法:To parse the string representation of a date and time that can be expressed in a number of predefined custom formats, call one of the following methods:

GetAllDateTimePatterns 方法所傳回之陣列中的自訂格式字串,取決於 DateTimeFormatInfo 物件提供格式資訊的目前文化特性行事曆。The custom format strings in the array returned by the GetAllDateTimePatterns method depends on the current calendar of the culture for which the DateTimeFormatInfo object supplies formatting information. 如果行事曆變更,這個方法所傳回的陣列也會變更。If the calendar changes, the array returned by this method also changes.

另請參閱

GetAllDateTimePatterns(Char)

傳回可以使用所指定標準格式字串來格式化日期和時間值的所有模式。Returns all the patterns in which date and time values can be formatted using the specified standard format string.

public:
 cli::array <System::String ^> ^ GetAllDateTimePatterns(char format);
public string[] GetAllDateTimePatterns (char format);
member this.GetAllDateTimePatterns : char -> string[]
Public Function GetAllDateTimePatterns (format As Char) As String()

參數

format
Char

標準格式字串。A standard format string.

傳回

String[]

包含標準模式的陣列,其中的日期和時間值可以使用指定的格式字串格式化。An array containing the standard patterns in which date and time values can be formatted using the specified format string.

例外狀況

format 不是有效的標準格式字串。format is not a valid standard format string.

範例

下列範例會顯示目前行事曆的日期和時間模式。The following example displays the date and time patterns for the current calendar.

#using <System.dll>

using namespace System;
using namespace System::Globalization;
public ref class SamplesDateTimeFormatInfo
{
public:
   static void Main()
   {
      
      // Creates a new DateTimeFormatinfo.
      DateTimeFormatInfo^ myDtfi = gcnew DateTimeFormatInfo;
      
      // Gets and prints all the patterns
      array<String^>^myPatternsArray = myDtfi->GetAllDateTimePatterns();
      Console::WriteLine(  "ALL the patterns:" );
      PrintIndexAndValues( myPatternsArray );
      
      // Gets and prints the pattern(s) associated with some of the format characters.
      myPatternsArray = myDtfi->GetAllDateTimePatterns( 'd' );
      Console::WriteLine(  "The patterns for 'd':" );
      PrintIndexAndValues( myPatternsArray );
      myPatternsArray = myDtfi->GetAllDateTimePatterns( 'D' );
      Console::WriteLine(  "The patterns for 'D':" );
      PrintIndexAndValues( myPatternsArray );
      myPatternsArray = myDtfi->GetAllDateTimePatterns( 'f' );
      Console::WriteLine(  "The patterns for 'f':" );
      PrintIndexAndValues( myPatternsArray );
      myPatternsArray = myDtfi->GetAllDateTimePatterns( 'F' );
      Console::WriteLine(  "The patterns for 'F':" );
      PrintIndexAndValues( myPatternsArray );
      myPatternsArray = myDtfi->GetAllDateTimePatterns( 'r' );
      Console::WriteLine(  "The patterns for 'r':" );
      PrintIndexAndValues( myPatternsArray );
      myPatternsArray = myDtfi->GetAllDateTimePatterns( 'R' );
      Console::WriteLine(  "The patterns for 'R':" );
      PrintIndexAndValues( myPatternsArray );
   }

    public:
       static void PrintIndexAndValues( array<String^>^myArray )  {
       int i = 0;
       for each ( String^ s in myArray )
           Console::WriteLine( "\t[{0}]:\t{1}", i++, s );
       Console::WriteLine();
    }
};

int main()
{
   SamplesDateTimeFormatInfo::Main();
}

/* 
This code produces the following output.

ALL the patterns:
        [0]:    MM/dd/yyyy
        [1]:    dddd, dd MMMM yyyy
        [2]:    dddd, dd MMMM yyyy HH:mm
        [3]:    dddd, dd MMMM yyyy hh:mm tt
        [4]:    dddd, dd MMMM yyyy H:mm
        [5]:    dddd, dd MMMM yyyy h:mm tt
        [6]:    dddd, dd MMMM yyyy HH:mm:ss
        [7]:    MM/dd/yyyy HH:mm
        [8]:    MM/dd/yyyy hh:mm tt
        [9]:    MM/dd/yyyy H:mm
        [10]:   MM/dd/yyyy h:mm tt
        [11]:   MM/dd/yyyy HH:mm:ss
        [12]:   MMMM dd
        [13]:   MMMM dd
        [14]:   ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
        [15]:   ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
        [16]:   yyyy'-'MM'-'dd'T'HH':'mm':'ss
        [17]:   HH:mm
        [18]:   hh:mm tt
        [19]:   H:mm
        [20]:   h:mm tt
        [21]:   HH:mm:ss
        [22]:   yyyy'-'MM'-'dd HH':'mm':'ss'Z'
        [23]:   dddd, dd MMMM yyyy HH:mm:ss
        [24]:   yyyy MMMM
        [25]:   yyyy MMMM

The patterns for 'd':
        [0]:    MM/dd/yyyy

The patterns for 'D':
        [0]:    dddd, dd MMMM yyyy

The patterns for 'f':
        [0]:    dddd, dd MMMM yyyy HH:mm
        [1]:    dddd, dd MMMM yyyy hh:mm tt
        [2]:    dddd, dd MMMM yyyy H:mm
        [3]:    dddd, dd MMMM yyyy h:mm tt

The patterns for 'F':
        [0]:    dddd, dd MMMM yyyy HH:mm:ss

The patterns for 'r':
        [0]:    ddd, dd MMM yyyy HH':'mm':'ss 'GMT'

The patterns for 'R':
        [0]:    ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
*/
 using System;
 using System.Globalization;
 public class SamplesDateTimeFormatInfo  {
 
    public static void Main()  {
 
       // Creates a new DateTimeFormatinfo.
       DateTimeFormatInfo myDtfi = new DateTimeFormatInfo();
 
       // Gets and prints all the patterns.
       String[] myPatternsArray = myDtfi.GetAllDateTimePatterns();
       Console.WriteLine( "ALL the patterns:" );
       PrintIndexAndValues( myPatternsArray );
 
       // Gets and prints the pattern(s) associated with some of the format characters.
       myPatternsArray = myDtfi.GetAllDateTimePatterns('d');
       Console.WriteLine( "The patterns for 'd':" );
       PrintIndexAndValues( myPatternsArray );
 
       myPatternsArray = myDtfi.GetAllDateTimePatterns('D');
       Console.WriteLine( "The patterns for 'D':" );
       PrintIndexAndValues( myPatternsArray );
 
       myPatternsArray = myDtfi.GetAllDateTimePatterns('f');
       Console.WriteLine( "The patterns for 'f':" );
       PrintIndexAndValues( myPatternsArray );
 
       myPatternsArray = myDtfi.GetAllDateTimePatterns('F');
       Console.WriteLine( "The patterns for 'F':" );
       PrintIndexAndValues( myPatternsArray );
 
       myPatternsArray = myDtfi.GetAllDateTimePatterns('r');
       Console.WriteLine( "The patterns for 'r':" );
       PrintIndexAndValues( myPatternsArray );
 
       myPatternsArray = myDtfi.GetAllDateTimePatterns('R');
       Console.WriteLine( "The patterns for 'R':" );
       PrintIndexAndValues( myPatternsArray );
    }
 
    public static void PrintIndexAndValues( String[] myArray )  {
       int i = 0;
       foreach ( String s in myArray )
          Console.WriteLine( "\t[{0}]:\t{1}", i++, s );
       Console.WriteLine();
    }
 }


/* 
This code produces the following output.

ALL the patterns:
        [0]:    MM/dd/yyyy
        [1]:    dddd, dd MMMM yyyy
        [2]:    dddd, dd MMMM yyyy HH:mm
        [3]:    dddd, dd MMMM yyyy hh:mm tt
        [4]:    dddd, dd MMMM yyyy H:mm
        [5]:    dddd, dd MMMM yyyy h:mm tt
        [6]:    dddd, dd MMMM yyyy HH:mm:ss
        [7]:    MM/dd/yyyy HH:mm
        [8]:    MM/dd/yyyy hh:mm tt
        [9]:    MM/dd/yyyy H:mm
        [10]:   MM/dd/yyyy h:mm tt
        [11]:   MM/dd/yyyy HH:mm:ss
        [12]:   MMMM dd
        [13]:   MMMM dd
        [14]:   ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
        [15]:   ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
        [16]:   yyyy'-'MM'-'dd'T'HH':'mm':'ss
        [17]:   HH:mm
        [18]:   hh:mm tt
        [19]:   H:mm
        [20]:   h:mm tt
        [21]:   HH:mm:ss
        [22]:   yyyy'-'MM'-'dd HH':'mm':'ss'Z'
        [23]:   dddd, dd MMMM yyyy HH:mm:ss
        [24]:   yyyy MMMM
        [25]:   yyyy MMMM

The patterns for 'd':
        [0]:    MM/dd/yyyy

The patterns for 'D':
        [0]:    dddd, dd MMMM yyyy

The patterns for 'f':
        [0]:    dddd, dd MMMM yyyy HH:mm
        [1]:    dddd, dd MMMM yyyy hh:mm tt
        [2]:    dddd, dd MMMM yyyy H:mm
        [3]:    dddd, dd MMMM yyyy h:mm tt

The patterns for 'F':
        [0]:    dddd, dd MMMM yyyy HH:mm:ss

The patterns for 'r':
        [0]:    ddd, dd MMM yyyy HH':'mm':'ss 'GMT'

The patterns for 'R':
        [0]:    ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
*/

Imports System.Globalization

Public Class SamplesDateTimeFormatInfo    
    
    Public Shared Sub Main()
        
        ' Creates a new DateTimeFormatinfo.
        Dim myDtfi As New DateTimeFormatInfo()
        
        ' Gets and prints all the patterns.
        Dim myPatternsArray As String() = myDtfi.GetAllDateTimePatterns()
        Console.WriteLine("ALL the patterns:")
        PrintIndexAndValues(myPatternsArray)
        
        ' Gets and prints the pattern(s) associated with some of the format characters.
        myPatternsArray = myDtfi.GetAllDateTimePatterns("d"c)
        Console.WriteLine("The patterns for 'd':")
        PrintIndexAndValues(myPatternsArray)
        
        myPatternsArray = myDtfi.GetAllDateTimePatterns("D"c)
        Console.WriteLine("The patterns for 'D':")
        PrintIndexAndValues(myPatternsArray)
        
        myPatternsArray = myDtfi.GetAllDateTimePatterns("f"c)
        Console.WriteLine("The patterns for 'f':")
        PrintIndexAndValues(myPatternsArray)
        
        myPatternsArray = myDtfi.GetAllDateTimePatterns("F"c)
        Console.WriteLine("The patterns for 'F':")
        PrintIndexAndValues(myPatternsArray)
        
        myPatternsArray = myDtfi.GetAllDateTimePatterns("r"c)
        Console.WriteLine("The patterns for 'r':")
        PrintIndexAndValues(myPatternsArray)
        
        myPatternsArray = myDtfi.GetAllDateTimePatterns("R"c)
        Console.WriteLine("The patterns for 'R':")
        PrintIndexAndValues(myPatternsArray)
    End Sub
    
    
    Public Shared Sub PrintIndexAndValues(myArray() As String)
        Dim i As Integer = 0
        Dim s As String
        For Each s In  myArray
            Console.WriteLine(ControlChars.Tab + "[{0}]:" + ControlChars.Tab _
               + "{1}", i, s)
            i += 1
        Next s
        Console.WriteLine()
    End Sub
End Class


' This code produces the following output.
'
' ALL the patterns:
' 	[0]:	MM/dd/yyyy
' 	[1]:	dddd, dd MMMM yyyy
' 	[2]:	dddd, dd MMMM yyyy HH:mm
' 	[3]:	dddd, dd MMMM yyyy hh:mm tt
' 	[4]:	dddd, dd MMMM yyyy H:mm
' 	[5]:	dddd, dd MMMM yyyy h:mm tt
' 	[6]:	dddd, dd MMMM yyyy HH:mm:ss
' 	[7]:	MM/dd/yyyy HH:mm
' 	[8]:	MM/dd/yyyy hh:mm tt
' 	[9]:	MM/dd/yyyy H:mm
' 	[10]:	MM/dd/yyyy h:mm tt
' 	[11]:	MM/dd/yyyy HH:mm:ss
' 	[12]:	MMMM dd
' 	[13]:	MMMM dd
' 	[14]:	ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
' 	[15]:	ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
' 	[16]:	yyyy'-'MM'-'dd'T'HH':'mm':'ss
' 	[17]:	HH:mm
' 	[18]:	hh:mm tt
' 	[19]:	H:mm
' 	[20]:	h:mm tt
' 	[21]:	HH:mm:ss
' 	[22]:	yyyy'-'MM'-'dd HH':'mm':'ss'Z'
' 	[23]:	dddd, dd MMMM yyyy HH:mm:ss
' 	[24]:	yyyy MMMM
' 	[25]:	yyyy MMMM
' 
' The patterns for 'd':
' 	[0]:	MM/dd/yyyy
' 
' The patterns for 'D':
' 	[0]:	dddd, dd MMMM yyyy
' 
' The patterns for 'f':
' 	[0]:	dddd, dd MMMM yyyy HH:mm
' 	[1]:	dddd, dd MMMM yyyy hh:mm tt
' 	[2]:	dddd, dd MMMM yyyy H:mm
' 	[3]:	dddd, dd MMMM yyyy h:mm tt
' 
' The patterns for 'F':
' 	[0]:	dddd, dd MMMM yyyy HH:mm:ss
' 
' The patterns for 'r':
' 	[0]:	ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
' 
' The patterns for 'R':
' 	[0]:	ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
' 

備註

這個方法會傳回陣列,其中包含對應至特定標準格式字串的自訂格式字串。This method returns an array containing the custom format strings that correspond to a particular standard format string. 如需標準格式字串的清單,請參閱標準日期和時間格式字串See Standard Date and Time Format Strings for a list of the standard format strings.

您可以在格式化作業中,使用 GetAllDateTimePatterns 方法所傳回陣列中的自訂格式字串。You can use the custom format strings in the array returned by the GetAllDateTimePatterns method in formatting operations. 不過,如果您這樣做,ParseTryParse 方法都無法成功剖析在該格式化作業中傳回之日期和時間值的字串表示。However, if you do, the string representation of a date and time value returned in that formatting operation cannot always be parsed successfully by the Parse and TryParse methods. 因此,您無法假設 GetAllDateTimePatterns 方法所傳回的自訂格式字串,可以用來反復存取日期和時間值。Therefore, you cannot assume that the custom format strings returned by the GetAllDateTimePatterns method can be used to round-trip date and time values. 下列範例說明此問題。The following example illustrates this problem. 它會抓取 DateTimeFormatInfo 物件,其中包含俄羅斯(俄文)文化特性的格式資訊。It retrieves a DateTimeFormatInfo object that contains formatting information for the Russia (Russian) culture. 它會針對每個標準格式字串呼叫 GetAllDateTimePatterns(Char) 方法,然後將傳回陣列中的每個自訂格式字串傳遞給 DateTime.ToString(String) 方法,以建立日期和時間的字串表示。It calls the GetAllDateTimePatterns(Char) method for each standard format string, and then passes each custom format string in the returned array to the DateTime.ToString(String) method to create the string representation of a date and time. 然後,此範例會藉由呼叫 DateTime.TryParse(String, DateTime) 方法,嘗試剖析此值。This example then attempts to parse this value by calling the DateTime.TryParse(String, DateTime) method. 如範例的輸出所示,某些自訂格式字串不會產生成功往返的日期和時間值。As the output from the example shows, some of the custom format strings do not produce a date and time value that successfully round-trips.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      CultureInfo culture = CultureInfo.CreateSpecificCulture("ru-RU");
      char[] formats = { 'd', 'D', 'f', 'F', 'g', 'G', 'm', 'o', 
                           'r', 's', 't', 'T', 'u', 'U', 'y' };
      DateTime date1 = new DateTime(2011, 02, 01, 7, 30, 45, 0);
      DateTime date2;
      int total = 0;
      int noRoundTrip = 0;

      foreach (var fmt in formats) {
         total = 0; 
         noRoundTrip = 0;
         foreach (var pattern in culture.DateTimeFormat.GetAllDateTimePatterns(fmt)) {
            total++;
            if (! DateTime.TryParse(date1.ToString(pattern), out date2)) {
               noRoundTrip++;
               Console.WriteLine("Unable to parse {0:" + pattern + "} (format '{1}')", 
                                 date1, pattern);
            }             
         }
         if (noRoundTrip > 0)
            Console.WriteLine("{0}: Unable to round-trip {1} of {2} format strings.\n",
                              fmt, noRoundTrip, total);
         else
            Console.WriteLine("{0}: All custom format strings round trip.\n", fmt);
      }
   }
}
// The example displays the following output:
//    d: All custom format strings round trip.
//    
//    Unable to parse 1 February 2011 г. (format 'd MMMM yyyy 'г.'')
//    Unable to parse 01 February 2011 г. (format 'dd MMMM yyyy 'г.'')
//    D: Unable to round-trip 2 of 2 format strings.
//    
//    Unable to parse 1 February 2011 г. 7:30 (format 'd MMMM yyyy 'г.' H:mm')
//    Unable to parse 1 February 2011 г. 07:30 (format 'd MMMM yyyy 'г.' HH:mm')
//    Unable to parse 01 February 2011 г. 7:30 (format 'dd MMMM yyyy 'г.' H:mm')
//    Unable to parse 01 February 2011 г. 07:30 (format 'dd MMMM yyyy 'г.' HH:mm')
//    f: Unable to round-trip 4 of 4 format strings.
//    
//    Unable to parse 1 February 2011 г. 7:30:45 (format 'd MMMM yyyy 'г.' H:mm:ss')
//    Unable to parse 1 February 2011 г. 07:30:45 (format 'd MMMM yyyy 'г.' HH:mm:ss')
//    Unable to parse 01 February 2011 г. 7:30:45 (format 'dd MMMM yyyy 'г.' H:mm:ss')
//    Unable to parse 01 February 2011 г. 07:30:45 (format 'dd MMMM yyyy 'г.' HH:mm:ss')
//    F: Unable to round-trip 4 of 4 format strings.
//    
//    g: All custom format strings round trip.
//    
//    G: All custom format strings round trip.
//    
//    m: All custom format strings round trip.
//    
//    o: All custom format strings round trip.
//    
//    r: All custom format strings round trip.
//    
//    s: All custom format strings round trip.
//    
//    t: All custom format strings round trip.
//    
//    T: All custom format strings round trip.
//    
//    u: All custom format strings round trip.
//    
//    Unable to parse 1 February 2011 г. 7:30:45 (format 'd MMMM yyyy 'г.' H:mm:ss')
//    Unable to parse 1 February 2011 г. 07:30:45 (format 'd MMMM yyyy 'г.' HH:mm:ss')
//    Unable to parse 01 February 2011 г. 7:30:45 (format 'dd MMMM yyyy 'г.' H:mm:ss')
//    Unable to parse 01 February 2011 г. 07:30:45 (format 'dd MMMM yyyy 'г.' HH:mm:ss')
//    U: Unable to round-trip 4 of 4 format strings.
//    
//    y: All custom format strings round trip.
Imports System.Globalization

Module Example
   Public Sub Main()
      Dim culture As CultureInfo = CultureInfo.CreateSpecificCulture("ru-RU")
      Dim formats() As String = { "d", "D", "f", "F", "g", "G", "m",
                                  "o", "r", "s", "t", "T", "u", "U", "y" }
      Dim date1 = New DateTime(2011, 02, 01, 7, 30, 45, 0)
      Dim date2 As DateTime
      Dim total, noRoundTrip As Integer

      For Each fmt In formats
         total = 0 : noRoundTrip = 0
         For Each pattern In culture.DateTimeFormat.GetAllDateTimePatterns(CChar(fmt))
            total += 1
            If Not DateTime.TryParse(date1.ToString(pattern), date2)
               noRoundTrip += 1
               Console.WriteLine("Unable to parse {0:" + pattern + "} (format '{1}')", 
                                 date1, pattern)
            End If             
         Next
         If noRoundTrip > 0 Then
            Console.WriteLine("{0}: Unable to round-trip {1} of {2} format strings.",
                              fmt, noRoundTrip, total)
            Console.WriteLine()
         Else
            Console.WriteLine("{0}: All custom format strings round trip.", fmt)
            Console.WriteLine()
         End If
      Next
   End Sub
End Module
' The example displays the following output:
'    d: All custom format strings round trip.
'    
'    Unable to parse 1 February 2011 г. (format 'd MMMM yyyy 'г.'')
'    Unable to parse 01 February 2011 г. (format 'dd MMMM yyyy 'г.'')
'    D: Unable to round-trip 2 of 2 format strings.
'    
'    Unable to parse 1 February 2011 г. 7:30 (format 'd MMMM yyyy 'г.' H:mm')
'    Unable to parse 1 February 2011 г. 07:30 (format 'd MMMM yyyy 'г.' HH:mm')
'    Unable to parse 01 February 2011 г. 7:30 (format 'dd MMMM yyyy 'г.' H:mm')
'    Unable to parse 01 February 2011 г. 07:30 (format 'dd MMMM yyyy 'г.' HH:mm')
'    f: Unable to round-trip 4 of 4 format strings.
'    
'    Unable to parse 1 February 2011 г. 7:30:45 (format 'd MMMM yyyy 'г.' H:mm:ss')
'    Unable to parse 1 February 2011 г. 07:30:45 (format 'd MMMM yyyy 'г.' HH:mm:ss')
'    Unable to parse 01 February 2011 г. 7:30:45 (format 'dd MMMM yyyy 'г.' H:mm:ss')
'    Unable to parse 01 February 2011 г. 07:30:45 (format 'dd MMMM yyyy 'г.' HH:mm:ss')
'    F: Unable to round-trip 4 of 4 format strings.
'    
'    g: All custom format strings round trip.
'    
'    G: All custom format strings round trip.
'    
'    m: All custom format strings round trip.
'    
'    o: All custom format strings round trip.
'    
'    r: All custom format strings round trip.
'    
'    s: All custom format strings round trip.
'    
'    t: All custom format strings round trip.
'    
'    T: All custom format strings round trip.
'    
'    u: All custom format strings round trip.
'    
'    Unable to parse 1 February 2011 г. 7:30:45 (format 'd MMMM yyyy 'г.' H:mm:ss')
'    Unable to parse 1 February 2011 г. 07:30:45 (format 'd MMMM yyyy 'г.' HH:mm:ss')
'    Unable to parse 01 February 2011 г. 7:30:45 (format 'dd MMMM yyyy 'г.' H:mm:ss')
'    Unable to parse 01 February 2011 г. 07:30:45 (format 'dd MMMM yyyy 'г.' HH:mm:ss')
'    U: Unable to round-trip 4 of 4 format strings.
'    
'    y: All custom format strings round trip.

若要剖析以數個預先定義的自訂格式表示之日期和時間的字串表示,請呼叫下列其中一個方法:To parse the string representation of a date and time that can be expressed in a number of predefined custom formats, call one of the following methods:

GetAllDateTimePatterns 方法所傳回之陣列中的自訂格式字串,取決於 DateTimeFormatInfo 物件提供格式資訊的目前文化特性行事曆。The custom format strings in the array returned by the GetAllDateTimePatterns method depends on the current calendar of the culture for which the DateTimeFormatInfo object supplies formatting information. 如果行事曆變更,這個方法所傳回的陣列也會變更。If the calendar changes, the array returned by this method also changes.

另請參閱

適用於